EP3155308A1 - Réparation de tuyaux - Google Patents

Réparation de tuyaux

Info

Publication number
EP3155308A1
EP3155308A1 EP15734465.6A EP15734465A EP3155308A1 EP 3155308 A1 EP3155308 A1 EP 3155308A1 EP 15734465 A EP15734465 A EP 15734465A EP 3155308 A1 EP3155308 A1 EP 3155308A1
Authority
EP
European Patent Office
Prior art keywords
piece
pipe
fiber reinforced
breach
fabric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15734465.6A
Other languages
German (de)
English (en)
Inventor
Scott Arnold
Tomas Jimenez
Nickolas DELETTO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manufactured Technologies Co LLC
Original Assignee
Fyfe Co LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fyfe Co LLC filed Critical Fyfe Co LLC
Publication of EP3155308A1 publication Critical patent/EP3155308A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/1645—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing material being introduced inside the pipe by means of a tool moving in the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/163—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a ring, a band or a sleeve being pressed against the inner surface of the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/18—Appliances for use in repairing pipes

Definitions

  • the present disclosure relates generally to the repair of pipes and more particularly to methods and systems for pipe repair in which holes in the pipe are patched.
  • liners or sheets made of fiber reinforced polymers can be attached to one or more portions of a pipe interior.
  • liners of this type can be formed in a tubular shape and dragged in or everted into the pipe to be repaired.
  • the lining may be formed by manually adhering sheets of repair material to the walls of the pipe.
  • a method of repairing a section of a pipe including a breach in the pipe comprises preparing a surface of a wall of the pipe generally around the breach.
  • a piece of conformable material of the type capable of carrying a curable polymer is sized in relation to a size of the breach.
  • the sized piece of conformable material is applied to the prepared surface so that the breach is covered by the piece of conformable material.
  • the piece of conformable material is impregnated with a curable polymer.
  • the curable polymer is cured within the piece of conformable material thereby to seal the breach against egress of groundwater into the pipe.
  • a repaired pipe having a breach in the side wall closed by the repair comprises a conditioned surface around the breach. Adhesive is applied to the conditioned surface. A piece of fiber reinforced polymer material is cured over the breach and joined to the side wall of the pipe at least in part by the adhesive. The piece of fiber reinforced polymer material seals the breach against egress of groundwater into the pipe. The piece of reinforced polymer material is sized to cover the breach.
  • FIG.1 is a perspective of a pipe having an opening in a side wall thereof;
  • FIG. 2 is an enlarged section taken in the plane including line 2-2 of Fig. 1 and schematically illustrating a repair of the pipe opening according to the principles of the present invention
  • FIG. 3 is a schematic cross section of a test system for testing a pipe repair.
  • FIG. 4 is a schematic bottom plan view of the test system with certain upper features of the test system illustrated in phantom.
  • a pipe 1 in need of repair shown schematically in Fig. 1 has a side wall hole or opening 3 caused by damage to the pipe.
  • the pipe 1 is located underground where groundwater may pass into the pipe 1 through the opening 3.
  • the size of the opening 3 is shown large for ease of visualization, but need not be as large as shown to permit undesired infiltration of groundwater into the pipe.
  • an opening, hole or breach may be no more than a crack or pinhole that extends through the side wall of the pipe allowing groundwater to pass into the interior of the pipe. Dirt and other debris may also flow into the pipe through the opening 3.
  • Repair of the opening 3 in the pipe 1 may be temporary until a more universal repair of the pipe is accomplished, or could be a longer term repair.
  • a portion of the internal wall of the pipe 1 around the opening 3 is prepared for bonding in a suitable manner.
  • the internal wall portion is conditioned to facilitate bonding of a material to the wall with an epoxy or other suitable adhesive.
  • Other portions of the pipe near the opening 3 are not required to be finished.
  • the internal wall portion is brought to a near white finish. This may be accomplished by abrasive blasting, mechanical grinding, hand sanding or by other suitable processes or combination of processes.
  • the materials used to accomplish the finish of the internal wall portion may be broadly referred to as "abraders.”
  • the internal wall portion is then roughened and then cleaned.
  • Surface roughening can be carried out by hand or with other mechanical assistance. For example, roughening can be achieved using high pressure water blasting, sand blasting, with a grinding wheel, wire brush or by other suitable techniques. Surface cleaning can be as simple as wiping with rags, vacuuming or broom cleaning. In other embodiments, solvents may be used or other special chemicals when, for example, reduction of chlorides or other contaminants is needed.
  • a stopgap seal of the opening Prior to conditioning the internal wall portion surrounding the opening 3, a stopgap seal of the opening may be employed. For example conformable materials may be forced by hand into the opening to achieve a momentary stoppage of infiltration.
  • a prime coat of adhesive is applied to the internal wall portion.
  • an epoxy may be used.
  • the epoxy should be one that forms a liquid barrier at least in any interstices of a fabric to which is it applied for use in forming an unbroken liquid barrier.
  • the epoxy also needs to prevent liquid from moving laterally across the fabric, which could result in leakage around the fabric.
  • Tyfo® S epoxy available from Fyfe Co. LLC of San Diego, California.
  • other suitable materials could be used within the scope of the present invention.
  • a first piece of fabric 5 capable of holding a hardening or curable material is sized in relation to the size of the opening 3 to cover the opening, but is not sized for lining the entire pipe. In most cases, that means the first piece of fabric 5 is sized much smaller than the circumference of the pipe at the location of the opening 3.
  • the first fabric piece 5 is applied over the opening 3 and against the internal wall portion next to the opening on the prime coat. Preferably the application occurs while the prime coat is still tacky.
  • the fabric is a fiber ladened woven fabric or chopped strand mat of glass fibers or other suitable fibrous materials (e.g., carbon fibers, basalt fibers, aramid fibers, ultrahigh molecular weight polyethylene fibers, or other, preferably non-conductive fibers, etc.).
  • a suitable multi-axial fabric comprises a woven fabric.
  • the woven fabric is a bi-directional woven fabric with warp and weft fibers generally oriented
  • a suitable bi-directional fabric material may include more or stronger fibers oriented in one direction (e.g., the warp direction) than the other direction (e.g., the weft direction).
  • the direction including more and/or stronger fibers, whether warp, weft or any other orientation within the fabric material may be referred to as the "strong direction" of the fabric material.
  • Other bi-directional materials include substantially the same amount of fibers in the warp and weft directions without departing from the scope of the invention.
  • the fabric sheet 5 has a satin or twill weave.
  • a suitable weave is one in which the weft floats or skips over as many as 12 warps before being woven in to the weave. The next pick repeats the float, but on a different set of warps.
  • the material will be at least minimally conformable to the surface (e.g., the interior of a pipe) to which it is applied.
  • "conformable” includes semi-rigid materials.
  • the material is configured to hold at least some hardenable material in such a fashion that the hardenable material (e.g., epoxy) can fill in any void spaces in the fabric.
  • the fabric can be treated with a sizing to improve the bond of the glass fiber to the epoxy.
  • Tyfo® WEB reinforcing fabric available from Fyfe Co. LLC of San Diego, California.
  • Tyfo® WEB reinforcing fabric is a satin woven glass fabric in which each weft bundle of glass fibers floats over three adjacent warp bundles of glass fibers. Materials of this construction have good resistance to penetration by liquids.
  • the first fabric piece 5 is impregnated (e.g., saturated) with a hardenable polymer or other hardenable material to form a fiber reinforced composite.
  • a hardenable polymer or other hardenable material to form a fiber reinforced composite.
  • the fabric 5 is impregnated such that the hardenable material fills substantially all of the void spaces in the fabric.
  • the first fabric piece 5 is impregnated prior to being placed against the internal wall portion surrounding the opening 3.
  • the fabric piece 5 could be placed against the primer coat on the internal wall portion dry and then impregnated within the scope of the present invention.
  • the fabric piece 5 may not be impregnated with resin at any point in the process.
  • a suitable hardenable polymer is an epoxy.
  • Tyfo® S epoxy available from Fyfe Co. LLC of San Diego California. Use of Tyfo® S epoxy as both the primer coat and the hardenable polymer has been found effective. However, it will be appreciated by those of ordinary skill in the art that different materials may be used for the primer coat and for the hardenable polymer within the scope of the present invention.
  • a second fabric piece 7 is placed over the first fabric piece 5 and against the primer coat on the internal wall portion surrounding the opening 3.
  • the second fabric piece 7 can be the same material as the first fabric piece 5, or be a different material.
  • the second fabric piece 7 can be impregnated with the same or a different hardenable polymer and then applied to the first fabric piece 5 and primer coat. It is also possible to apply the second fabric piece 7 in an unimpregnated or dry condition to the first fabric piece 5 and then saturate the second fabric piece.
  • the first fabric piece 5 and the second fabric piece 7 are cut so that the fibers of the first piece are oriented at approximately 45° with respect to the edges of the piece and the fibers of the second piece are oriented at 90° with respect to the edges.
  • the second fabric sheet can be applied to the first fabric sheet so the fibers in the second fabric sheet are oriented transverse (e.g., at an angle of about 45°) with respect to the fibers of the first fabric sheet.
  • the second piece 7 may be omitted without departing from the scope of the present invention.
  • additional pieces of material may be applied. The use of two pieces with differently aligned fibers may improve the water tightness of the combined fabric pieces.
  • the impregnated fabric pieces 5, 7 can be allowed to cure in the air or more rapidly cured using heat, UV or other curing stimulant. As cured, the epoxy and fabric pieces 5, 7 provide a strong and liquid tight covering for the opening 3, preventing further infiltration of groundwater into the pipe 1. This allows a more universal repair of the pipe 1 to be carried out in optimum (e.g., dry) conditions conducive to the best overall repair result.
  • other pieces of curable materials may be applied to the internal or external walls of the pipe 1 in such a manner as to completely line the interior of the pipe.
  • An example of a suitable system for overall repair of the pipe is shown in U.S. Patent No. 5,931, 198. This material can be applied over the fabric pieces 5, 7. It is also possible to form material into a tube and drag or evert the tube into the pipe 1.
  • the tube of material can be impregnated with a hardenable polymer and cured in the pipe in manner well known to those of ordinary skill in the art.
  • a test of a system for evaluating the effectiveness of a liquid tight covering placed over an opening in a side wall of a pipe is generally indicated at reference number 100.
  • test systems 100 were used to test the effectiveness of one exemplary embodiment of a liquid tight covering configured to be placed over an opening in a pipe wall. After briefly describing the test system 100 and how it was used during testing, the results will be described below.
  • Each test system 100 includes a generally square steel plate 110, which is designed to function like the wall of the pipe 1.
  • the plate 110 has a length and width of about 12 inches (about 30.48 cm), respectively, and a thickness of about 0.375 inches (about 0.953 cm).
  • the slot 112 has a length of about 6 inches (about 15.24 cm) and a width of about 0.75 inches (about 1.905 cm).
  • the plate 110 is secured by a liquid tight connection to one end of a cylinder 114 so that the slot 112 is fluidly coupled to the interior of the cylinder.
  • the cylinder has in interior diameter of about 6 inches (about 15.24 cm) and is arranged relative the plate 110 so that the slot 112 is centered diametrically at one end of the cylinder interior.
  • the cylinder 114 is adapted to be at least partially filled with water and includes a compressed air fitting 116 opposite the plate 110.
  • the technicians prepared the surfaces of the plates 110 opposite the cylinders 114 and applied prime coats of Tyfo® S epoxy.
  • the technicians cut a first rectangular shaped piece 5 of Tyfo® Web fabric to a length of about 12 inches (about 30.48 cm) and a width of about 6 inches (about 15.24 cm).
  • the technicians impregnated the first pieces of fabric 5 with Tyfo® S epoxy and applied each to a respective plate 110 in a centered position in which the longitudinal ends of the sheet were substantially aligned with opposite sides of the plate and the length of the fabric sheet was oriented substantially parallel to the length of the slot 112. In this position, the fabric sheet 5 completely covered the slot 112.
  • the fibers in the piece of fabric 5 are arranged so as to intersect the sides of the sheet at an angle of about 90°.
  • the piece of fabric 5 is applied over the slot 112 so that the fibers make an angle of 90° with respect to a longitudinal axis of the slot.
  • the technicians also cut a second, substantially square sheet fabric sheet of Tyfo® Web fabric 7 measuring about 12 inches (about 30.48 cm) between opposite corners.
  • the technicians impregnated the second pieces with Tyfo® S epoxy and subsequently applied each to a respective plate 110 in a centered position in which the corners of the sheet were substantially aligned with the sides of the plate.
  • the second pieces of fabric 7 substantially covered the slots 112.
  • the fibers of the second piece of fabric 7 are oriented at right angles with respect to the edges of the piece of fabric.
  • the bidirectional fibers of the fabric 7 make angles of +45° with respect to the longitudinal axis of the slot 112.
  • the piece of fabric 7 was applied so that the direction in which the fibers are strongest is oriented at 45° with respect to the direction in which the fibers are strongest in the piece of fabric 5.
  • the epoxy was allowed to cure at ambient conditions for a minimum of 72 hours. Once the epoxy cured, the pieces of fabric 5, 7 formed an exemplary liquid tight covering over the slot 112.
  • the cylinders 114 of each of the test samples were partially filled with deionized water.
  • the fluid inside four of the ten cylinders 114 was pressurized to an internal pressure of about 50 psi (about 345 kPa), and the fluid inside the other two cylinders was pressurized to an internal pressure of 100 psi (about 689 kPa).
  • a temperature monitoring system continuously monitored the environmental temperature throughout the seven-day period, and a humidity monitoring system provided daily recordings of the humidity in the holding facility.
  • the patches of both the 50 psi test systems and the 100 psi test systems showed no signs of leakage. Due to environmental changes over the seven day period, the internal pressures of each of the 50 psi cylinders decreased by about 2-3 psi (about 13.79-20.68 kPa) per day and the internal pressures of each of the 100 psi cylinders decreased by about 5-7 psi (about 34.47-48.26 kPa) per day. To maintain substantially constant fluid pressures throughout the seven-day holding period, the technicians added pressure to each of the cylinders 114 on a daily basis.
  • the results of the seven day holding period testing indicated that the coverings were substantially liquid tight at fluid pressures of about 50 psi (about 345 kPa) for a period of seven days. Likewise, the results of the seven day holding period testing indicated that the coverings were substantially liquid tight at fluid pressures of about 100 psi (about 689 kPa) for a period of seven days.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pipe Accessories (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de réparation d'une section d'un tuyau (1) comprenant une percée (3) dans le tuyau. Une surface d'une paroi du tuyau est préparée globalement autour de la percée (3). Une pièce en un matériau façonnable (5) du type capable de supporter un polymère durcissable est dimensionnée par rapport à une taille de la percée (3). La pièce dimensionnée en matériau façonnable (5) est appliquée sur la surface préparée de telle sorte que la percée (3) est recouverte par la pièce en matériau façonnable (5). La pièce en matériau façonnable (5) est imprégnée d'un polymère durcissable. Le polymère durcissable est durci à l'intérieur de la pièce en matériau façonnable (5) afin de rendre ainsi la percée (3) étanche contre un écoulement de l'eau souterraine dans le tuyau (1).
EP15734465.6A 2014-06-16 2015-06-16 Réparation de tuyaux Withdrawn EP3155308A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201462012762P 2014-06-16 2014-06-16
PCT/IB2015/054554 WO2015193816A1 (fr) 2014-06-16 2015-06-16 Réparation de tuyaux

Publications (1)

Publication Number Publication Date
EP3155308A1 true EP3155308A1 (fr) 2017-04-19

Family

ID=53514372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15734465.6A Withdrawn EP3155308A1 (fr) 2014-06-16 2015-06-16 Réparation de tuyaux

Country Status (11)

Country Link
US (1) US10001238B2 (fr)
EP (1) EP3155308A1 (fr)
JP (1) JP2017524875A (fr)
KR (1) KR20170015926A (fr)
CN (1) CN106662284A (fr)
AU (1) AU2015275790A1 (fr)
CA (1) CA2950056C (fr)
NZ (2) NZ748068A (fr)
PH (1) PH12016502335A1 (fr)
SG (1) SG11201609465TA (fr)
WO (1) WO2015193816A1 (fr)

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CN105605332A (zh) * 2016-01-21 2016-05-25 中国石油大学(北京) 一种基于碳纤维的穿越活动断层区管道增强圈
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CN108468901B (zh) * 2018-03-21 2019-09-20 江苏长龄液压股份有限公司 一种内加套管式管路补漏方法
CN108548042B (zh) * 2018-03-21 2020-04-28 江苏长龄液压股份有限公司 一种管路补漏方法
KR102054235B1 (ko) * 2019-10-01 2019-12-12 에코라인 주식회사 면패치를 이용한 배관 누수 보수 방법
CN110834175A (zh) * 2019-11-25 2020-02-25 南通三圣石墨设备科技股份有限公司 一种堵管修补方法
KR102358044B1 (ko) 2020-05-27 2022-02-04 강형민 유체 이송 구조물 보수방법 및 장치
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NZ748068A (en) 2019-09-27
KR20170015926A (ko) 2017-02-10
CA2950056C (fr) 2018-10-09
AU2015275790A1 (en) 2016-12-01
NZ726229A (en) 2019-02-22
JP2017524875A (ja) 2017-08-31
WO2015193816A1 (fr) 2015-12-23
PH12016502335A1 (en) 2017-02-13
US20150362115A1 (en) 2015-12-17
US10001238B2 (en) 2018-06-19
CN106662284A (zh) 2017-05-10
SG11201609465TA (en) 2017-01-27
CA2950056A1 (fr) 2015-12-23

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